The Crimson Binome
Hero
Your first problem is that easy fights, which pose no threat, take a long time to resolve. Your second problem is that the PCs are apparently locked into inescapable death matches, against their will. If you fix those two problems, then contriving the third situation won't seem like the only option.But let me ask you: which is more fun
a) a combat encounter that might take a long time to resolve but never feels dangerous and never could pose a threat
b) a combat encounter which inadvertently turns out to be impossibly hard; monster AC you can't hit, special attacks you can't defend against
or c) a combat encounter that's challenging but not too challenging, so you actually have a reason to deploy your abilities in smart ways and are encouraged to actually team-work to make the sum of your party greater than its parts
There's no such thing as a great game, if it's actually contrived behind an illusion. Deception is the worst quality that a GM can have. If you can't trust that your GM is playing honestly, then there's no point in even playing.Remember all of that takes place behind the DM screen. As a player you shouldn't deny the DM good tools just because you want to live in a bubble of illusion the great game you're in came together just by accident.
Remember, the GM has three jobs: 1) Describe the world; 2) Play the NPCs; 3) Adjudicate uncertainty in action resolution.
This is an RPG. It's not fight club.